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Leeds-Genoa Index for Fracture Non-Union of a Long Bone Following Fixation (LEG-NU Index)

Description

Santolini et al reported an index for a patient with a long bone fracture that has undergone fixation. This can help to identify a fracture that may show non-union. The authors are from the University of Genoa, the University of Leeds and Chapel Allerton Hospital in Leeds.


Patient selection: long bone fracture following fixation

 

Parameters:

(1) site of fracture

(2) soft tissue damage

(3) type of fracture

(4) displacement

(5) method of reduction

(6) post-surgical fracture gap in mm

(7) mechanical stability

(8) infection (superficial or deep)

 

Parameter

Finding

Points

site of fracture

tibia

1

 

other

0

soft tissue damage

internal degloving or open fracture

1

 

neither

0

type of fracture

wedge or comminuted

1

 

other

0

displacement

<= 75% of shaft width

0

 

> 75% of shaft width

1

method of reduction

open

1

 

other (closed)

0

fracture gap in mm

<= 4 mm

0

 

> 4 mm

1

mechanical stability

not optimum

1

 

optimum

0

infection

no

0

 

yes

1

 

total score =

= SUM(points for all of the parameters)

 

Interpretation:

• minimum score: 0

• maximum score: 8

• The higher the score the greater the risk of nonunion.

 

Score

Union

0 to 2

100%

3

85%

4

55%

5

21%

6

3%

7 or 8

0%

 

Performance:

• The area under the ROC curve is 0.92.


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